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Vishay General Semiconductor - Diodes Division SMCJ26HE3/9AT
- Part No.:
- SMCJ26HE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ26HE3/9AT.pdf
- Description:
- TVS DIODE 26VWM 46.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,709
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Product details
Overview
SMCJ26HE3/9AT from Vishay is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 26 V standoff voltage (VWM), 28.9–31.9 V breakdown range (VBR), 42.1 V clamping voltage at 35.6 A peak pulse current, 1500 W peak pulse power rating, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMCJ26HE3/9AT datasheet, SMCJ26HE3/9AT pinout, SMCJ26HE3/9AT application, or SMCJ26HE3/9AT equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 75 °C/W), RoHS-compliant matte tin terminations, and J-STD-002 solderability - all critical for automotive ECU, industrial sensor interface, and 24 V bus protection designs.
Technical Context
The SMCJ26HE3/9AT operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (28.9–31.9 V at 1.0 mA test current). Its low incremental surge resistance enables rapid clamping to 42.1 V at 35.6 A (10/1000 µs waveform), limiting energy dissipation in protected circuits.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads, it delivers 1500 W peak pulse power with derating above 25 °C (per Fig. 2), junction temperature range of –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 28.9 V / 31.9 V at 1.0 mA - Ensures reliable triggering within defined tolerance band |
| VC @ IPPM | 42.1 V at 35.6 A - Clamped voltage during 10/1000 µs surge, defining maximum stress on downstream ICs |
| PPPM | 1500 W - Peak surge power handling capability under standardized transient waveform |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient, guiding heatsinking requirements on PCB |
| ID @ VWM | 1.0 µA - Low leakage ensures minimal standby power loss in battery-powered systems |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DO-214AB (SMCJ), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on one end; compliant with UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 24 V rail); conducts during overvoltage to shunt surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity stress |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring extended lifetime and field reliability |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for sensitive 3.3 V/5 V logic interfaces |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns - no baking required prior to assembly |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualified variant with JESD 201 Class 2 whisker resistance for high-reliability solder joints |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before they reach DC/DC converters and microcontrollers. Use Value: Limits transient voltage to ≤42.1 V, preventing damage to 36 V-rated input stages and ensuring AS-1000 compliance for ISO 7637-2 Pulse 5a. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O lines in PLC analog modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Mounted directly at connector entry point to divert surge energy away from precision op-amps and ADC front-ends. Use Value: 1500 W peak power rating handles repetitive 1 kV/500 A surges per IEC 61000-4-5, preserving measurement accuracy and system uptime. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing 48 V PoE+ or telecom rectifier outputs against lightning-induced surges on outdoor cabinet power feeds. IC Role / Device Role / Timing Role: Placed upstream of DC/DC isolation stage to absorb common-mode transients before they couple into isolated domains. Use Value: 42.1 V clamping voltage maintains safe margin below 60 V absolute maximum ratings of downstream SiC MOSFET gate drivers. | Use Scenario: Shielding microcontroller GPIO and motor driver enable lines in smart washing machines from commutation noise generated by BLDC motors. IC Role / Device Role / Timing Role: Connected across MCU I/O pins and chassis ground to suppress sub-100 ns ringing and EFT bursts per IEC 61000-4-4. Use Value: 1.0 µA leakage at 26 V prevents false triggering in low-power sleep modes while maintaining fast <1 ps response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26AHE3/A | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VC specs | Suitable for space-constrained consumer electronics where 1500 W surge capacity is not required | Select SMAJ26AHE3/A only if board layout limits pad area and surge threat level is limited to IEC 61000-4-5 Level 2 |
| SMCJ26A-E3/9AT | Commercial-grade (non-AEC-Q101), identical electrical specs and DO-214AB package, E3 suffix instead of HE3 | Applicable in non-automotive industrial or computing systems where automotive qualification is unnecessary | Choose SMCJ26A-E3/9AT for cost-sensitive BOMs where AEC-Q101 is not mandated by end-equipment standards |
Compared with SMCJ26HE3/9AT, SMAJ26AHE3/A offers reduced surge robustness in a smaller footprint, while SMCJ26A-E3/9AT provides identical protection performance without automotive qualification - enabling trade-offs between reliability assurance, board space, and cost.
Availability
SMCJ26HE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC analog modules, and telecom 48 V power inputs requiring stable component supply, AEC-Q101 traceability, and 13" tape-and-reel delivery for high-volume SMT production.
Supply support for SMCJ26HE3/9AT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience is mission-critical.
FAQ
What is the clamping voltage of the SMCJ26HE3/9AT under a 10/1000 µs surge?
The SMCJ26HE3/9AT clamps to a maximum of 42.1 V when subjected to its rated peak pulse current of 35.6 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with downstream components' absolute maximum ratings.
Is the SMCJ26HE3/9AT suitable for automotive applications?
Yes, the SMCJ26HE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use. Its qualification covers temperature cycling, high-temperature reverse bias (HTRB), and ESD testing per JESD22-A114. The HE3 suffix confirms compliance with JESD 201 Class 2 whisker resistance, making SMCJ26HE3/9AT appropriate for engine control, body electronics, and ADAS modules where long-term field reliability is mandatory.
What does the 'HE3' suffix mean in SMCJ26HE3/9AT?
The 'HE3' suffix in SMCJ26HE3/9AT indicates two key attributes: 'H' denotes AEC-Q101 qualification, and 'E3' specifies RoHS-compliant construction with matte tin plating meeting J-STD-002 solderability and JESD 201 Class 2 whisker resistance. This distinguishes it from commercial-grade 'E3' variants and confirms suitability for high-reliability automotive and industrial deployments.
How does the SMCJ26HE3/9AT differ from the SMCJ26A-E3/9AT?
The SMCJ26HE3/9AT and SMCJ26A-E3/9AT share identical electrical specifications, DO-214AB package, and 13" tape-and-reel packaging (9AT), but differ in qualification: SMCJ26HE3/9AT is AEC-Q101 qualified with JESD 201 Class 2 whisker resistance, whereas SMCJ26A-E3/9AT is commercial-grade. This makes SMCJ26HE3/9AT mandatory for automotive applications, while SMCJ26A-E3/9AT serves cost-sensitive industrial or consumer designs.
What is the thermal resistance of the SMCJ26HE3/9AT, and how does it affect PCB layout?
The SMCJ26HE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes no additional heatsinking; designers must allocate sufficient copper area and consider airflow or adjacent thermal mass to maintain junction temperature below 150 °C during repeated surge events - especially in enclosed automotive or industrial enclosures.
SMCJ26HE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 46.6V
- Current - Peak Pulse (10/1000µs):
- 32.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ26HE3/9AT FAQ
1.How can I place an order for SMCJ26HE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ26HE3/9AT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMCJ26HE3/9AT reliable?
The price and inventory of SMCJ26HE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ26HE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ26HE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ26HE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ26HE3/9AT?
SMCJ26HE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ26HE3/9AT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMCJ26HE3/9AT?
For technical support, including SMCJ26HE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ26HE3/9AT requirements.
6.How does Aetrix verify that SMCJ26HE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ26HE3/9AT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMCJ26HE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ26HE3/9AT?
All SMCJ26HE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ26HE3/9AT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMCJ26HE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ26HE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ26HE3/9AT Tags
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